Finding the Fourth Proportional to 7,443.61, 10,272.21 and 4,086.77

Step by Step Solution

1. Step 1: Write the proportion equation
   7,443.61 : 10,272.21 = 4,086.77 : x
2. Step 2: Convert to fraction form
   7,443.61/10,272.21 = 4,086.77/x
3. Step 3: Cross multiply
   7,443.61x = 10,272.21 × 4,086.77
4. Step 4: Simplify right side
   7,443.61x = 41,980,092.98
5. Step 5: Solve for x
   x = 41,980,092.98/7,443.61
6. Step 6: Final answer
   x = 5,639.75